<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <style>
    div{
      color: rgba(2550, 0, 0, 0.7); /*字间距 通常用于中文*/
    }
  </style>
</head>
<body>
<div> 颜色半透明</div>
<!--<p>my name is andy</p>-->
</body>
</html>
